I have been trying to come up with a valid reason why she would want you isolated while she socialised with her friends and i can't.
If as you suggest she is worried about you flirting then she has serious issues.
After reading your last post (disciplined wtf) i am thinking it may be some kind of power trip for.
Obviously I dont know the woman involved but that is what comes across to me from your posts.
Just because someone has been sober a long time it doesnt make them a great person, is there any one else there you relate too more, maybe you should ask for advice from them.